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The Ruinous Powers Collector's Edition Wield the destruction the gods of chaos demand with this all-foil Collector's Edition

The reason for why it has to do that is pretty obvious, considering that it does, in fact, hit for 6

Because it no longer has a legal target, it never comes into play and goes straight from the stack to the graveyard

Even if the opponent has Leyline of the Void or Rest in Peace that you dont have another answer for, Oko can turn your one- and zero-power creatures into 3/3s, giving your backdoor plan of attacking with horrible creatures some real teeth, especially against an opponent who maybe took too many mulligans to find a hate card